309 | ÷ | 31 | × | x | + | 389 2 | ÷ | 31 | × | ( | x | + | 15 | ) | + | 93 | ÷ | 31 | × | ( | x | + | 30 | ) | = | 1230 |
方程左边 = | 309 31 | x | + | 389 62 | ( | x | + | 15 | ) | + | 3 | ( | x | + | 30 | ) |
309 31 | x | + | 389 62 | ( | x | + | 15 | ) | + | 3 | ( | x | + | 30 | ) | = | 1230 |
方程左边 = | 309 31 | x | + | 389 62 | x | + | 389 62 | × | 15 | + | 3 | ( | x | + | 30 | ) |
= | 309 31 | x | + | 389 62 | x | + | 5835 62 | + | 3 | ( | x | + | 30 | ) |
= | 1007 62 | x | + | 5835 62 | + | 3 | ( | x | + | 30 | ) |
= | 1007 62 | x | + | 5835 62 | + | 3 | x | + | 3 | × | 30 |
= | 1007 62 | x | + | 5835 62 | + | 3 | x | + | 90 |
= | 1193 62 | x | + | 11415 62 |
1193 62 | x | + | 11415 62 | = | 1230 |
1193 62 | x | = | 1230 | − | 11415 62 |
1193 62 | x | = | 64845 62 |
x | = | 64845 62 | ÷ | 1193 62 |
= | 64845 62 | × | 62 1193 |
= | 64845 | × | 1 1193 |
x | = | 64845 1193 |
x | = | 54.354568 |